lec18_recent - CS6670: Computer Vision Noah Snavely Lecture...

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Lecture 18: Recent work in recognition (slides adapted from Dan Huttenlocher, Mark Everingham, and James Hays) CS6670: Computer Vision Noah Snavely
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Announcements Project 3: Eigenfaces due Wednesday, November 11 at 11:59pm
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Object recognition Category recognition has been the focus of extensive research in the past decade Extensive use and development of machine learning techniques, better features Moderate-scale datasets derived from the Web PASCAL VOC: 20 object categories, > 10K images, > 25K instances, hand-labeled ground truth, annual competitions
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Twenty object categories (aeroplane to TV/monitor) Three challenges: Classification challenge (is there an X in this image?) Detection challenge (draw a box around every X) Segmentation challenge
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is is there a cat?
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Chance essentially 0
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Sliding window-style classifiers SVM, Adaboost Flexible spatial template: “star model” Separate classifiers by viewpoint
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lec18_recent - CS6670: Computer Vision Noah Snavely Lecture...

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